create_timelapse.py

#!/usr/bin/env python
#
# Script to help create time-lapse videos
# But done in nasty way so that it works on cygwin while
# Utilizing ffmpeg on windows
# Also will fill in gaps if sequential images are missing
#
##################################################


import argparse
import sys, os
import datetime
from shutil import copyfile
import time

image_types = ('.png', '.jpg', '.jpeg')

def parseArgs():
    parser = argparse.ArgumentParser()
    parser.add_argument("-f", "--folder", action='store', dest='images_folder', help="Folder that contains all images and subfolders you want to create videos for", required=True, default=None)
    parser.add_argument("-r", "--recreate-videos", action='store', dest='recreate_videos', help="Recreates videos otherwise if they exist they will be skipped", required=False, default=False)
    parser.add_argument("-v", "--verbose", action='store', dest='verbose', help="Allows ffmpeg to be verbose", required=False, default=False)



    return parser.parse_args()


def get_folders_with_images(img_folder, file_extension):
   folders_with_images = []

   all_folders = [x[0] for x in os.walk(img_folder)]

   for folder in all_folders:
     for file_name in os.listdir(folder):
         if file_name.lower().endswith(image_types):
          folders_with_images.append(folder)
          break

   return folders_with_images


def get_start_number(folder):
  start_num = -1

  for file_name in os.listdir(folder):
    if file_name.lower().endswith(image_types):
      number = file_name[1:file_name.rfind(".")]
      if start_num == -1 or start_num > int(number):
        start_num = int(number)

  return start_num


def print_elapsed_time(start_time, end_time):
  elapsed_time = end_time - start_time

  days = int(elapsed_time.seconds / (3600*24))
  hours = int((elapsed_time.seconds - days*3600*24)/3600)
  minutes = int((elapsed_time.seconds - days*3600*24 - hours*3600)/60)
  seconds = int((elapsed_time.seconds - days*3600*24 - hours*3600 - minutes*60))

  print(elapsed_time.seconds)
  print(str(days) + " days " + str(hours) + " hours " + str(minutes) + " min " + str(seconds) + " sec")


#This will fill in gaps it finds in file numbers
def fill_in_gaps(folder, start_num):
  last_img_file = "G" + str(start_num).zfill(7) + ".JPG"

  file_list = os.listdir(folder)
  biggest_num = start_num

  #Find biggest file Number
  for file_name in file_list:
    if file_name.lower().endswith(image_types):
      temp_num = int(file_name[1:-4])
      if temp_num > biggest_num:
        biggest_num = temp_num


  #Check sequence
  for x in range(start_num, biggest_num):
    file_check_name = "G" + str(x).zfill(7) + ".JPG"

    if not os.path.exists(folder + "/" + file_check_name):
      prior_file = "G" + str(x-1).zfill(7) + ".JPG"
      print("Missing sequential file !!!!\n copying prior file \n'" + folder + "/" + prior_file + "' to\n'" + folder + "/" + file_check_name + "'")
      copyfile(folder + "/" + prior_file,folder + "/" + file_check_name)
      time.sleep(1)



################################################################################
#  MAIN
################################################################################
if __name__ == '__main__':
  args = parseArgs()

  img_folder = args.images_folder
  recreate = args.recreate_videos
  verbose = args.verbose

  #Start timer
  start_time = datetime.datetime.now()


  #check if folder exists
  if os.path.exists(img_folder):
    folders_with_images = get_folders_with_images(img_folder, ".JPG")
    print(" === Obtaining all folders with image data ===")
    x = 0
    for folder in folders_with_images:
       x += 1
       print(" === working on " + str(x) + "/" + str(len(folders_with_images)) + " === ")
       video_name = img_folder[img_folder.rfind('/')+1:] + folder[len(img_folder):].replace("/", "_") + ".mp4"

       #if exists and recreate:
       if os.path.isfile(img_folder + "/" + video_name) and not recreate:
          print("video file exists '" + str(video_name) + "' ... Skipping creation")
          #Want to skip
          continue


       #Find start number of files!
       start_number = get_start_number(folder)

       #Use ffmpeg on the command line to create video
       #Had to do some funky stuff since it is using the windows ffmpeg
       individual_start_time = datetime.datetime.now()

       #fill in missing gaps in images by copying the last image up
       fill_in_gaps(folder, start_number)

       not_verbose = ""
       if not verbose:
          not_verbose = "-nostats -loglevel 0"

       linux_command = "cd " + folder + "; /cygdrive/c/ffmpeg/bin/ffmpeg -err_detect ignore_err -y " + not_verbose + " -start_number " + str(start_number) + " -i G%07d.JPG -vcodec libx264 -pix_fmt yuv420p " + img_folder.replace("/cygdrive/c","C:") + "/" + video_name
       os.system(linux_command)

       print_elapsed_time(individual_start_time, datetime.datetime.now())
  else:
    print("Folder does not exist '" + str(img_folder) + "' ... exiting")
    sys.exit(1)

  print(" === Job Complete == ")
  print_elapsed_time(start_time, datetime.datetime.now())